Curious when you guys are topping. I have just entered week 4 and the 5th real pair of leaves is just developing. Should I top now or wait for the 6th? Root system should be fine by now for the plant to handle the stress, right?
Wait till the plant reached 6 nodes and then top above the 5th node and cut away the 1st (lowest) node.
Then use LST to keep all the branches at the same height to prepare them perfect for the SCROG.
Enjoy your grow!
I top above the 4th pair of leaves, a new way I learned to top is by removing the inner leaves by hand it a roll off like a ball, this way does not show signs of stress and continues to grow.